Siregar, T. M., Sagala, A., Nurlaylly, E., Sinaga, G., & Damanik, T. (2023). Implementasi Deret Hitung Dan Deret Ukur Dalam Bidang Ekonomi. Innovative: Journal Of Social Science Research, 3(2), 5566–5577. Retrieved from https://j-innovative.org/index.php/Innovative/article/view/985